Malicious PDF — malware analysis report

Static analysis result for SHA-256 64238aa5c8327004…

MALICIOUS

PDF

94.7 KB Created: 2021-09-07 17:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c1e07eb0a49eeb9cde618e10d8b18b04 SHA-1: a9cadd13852b96bd6e14f0801cbc74ad0dc45c5a SHA-256: 64238aa5c832700411cc58f068c9a0ac5f02a17653df761da6a8aeeac0320eb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The embedded URLs and the PDF structure strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160829063b23d4---nomisodotika.pdf In PDF document text
    • http://sequirk.ie/userfiles/file/98653511732.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/95988816662.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/8oifmgikvp2dovu0m3v6rc0ov7/fopivadomekeduxiwalegew.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/paruvemabelikejusup.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/tabemafeji.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/balol.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/d40e50e588b511b7501dcff0aa766dad/55497203488.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/49859774700.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/80354630012.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/wumeguwazapomed.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ab598286241---laferesavimiduvasuvojop.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/md8dpll38tckght4fu6ddd5594/jiwibolodi.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/92598315274.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/vugiguf.pdfIn PDF document text
    • https://samowar.me/userfiles/files/84821373018.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210830_051141.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210822/file/jagasew.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/b951d8d4d6f8fcf84d63d5f8b7a469fc/rovopo.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f44d20ca4c---75666407135.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16106f319d041d---bazosozularanowoni.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/xidomibalujupoworeme.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/c94c26b7cc73a7212eac4b3cde6ae478/22510302155.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=friends+pilot+script+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB4 18796 bytes
SHA-256: 0999d5eb6843e29f1a1117048d6290ab104e7ca9e86208dd8993354afa09f4d2
font_01_sfnt_off00013d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D76 10428 bytes
SHA-256: d8eb53d7ab1edfd00d8e68635be343c01d8c7cc2efc38aa7ca4832cfb8f2db37
font_02_sfnt_off00015521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15521 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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